This week, 4 Oil Gas & Consumable Fuels stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Tesoro Corporation’s (TSO) ratings are looking better this week, moving up to a B from last week’s C. Tesoro Corporation is an independent company that refines crude oil, sells refined products in bulk and sells motor fuels on the retail market. The company also gets A’s in operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of TSO stock.

PBF Energy, Inc. Class A (PBF) improves from a C to a B rating this week. PBF Energy, Inc. Class A operates as an independent petroleum refiner and supplier of unbranded transportation fuels, heating oil, petrochemical feedstocks, lubricants and other petroleum products in the United States. For more information, get Portfolio Grader’s complete analysis of PBF stock.

Sasol Limited Sponsored ADR (SSL) shows solid improvement this week. The company’s rating rises from a C to a B. Sasol Limited Sponsored ADR is an integrated energy and chemicals company with production facilities in South Africa, Europe, North America and Asia. The company also gets A’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of SSL stock.

This week, Ship Finance International Limited’s (SFL) ratings are up from a C last week to a B. Ship Finance International Limited is engaged mainly in the ownership and operation of vessels and offshore-related assets. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of SFL stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.